I'm adding 8 fire poofer cannons to our mutant vehicle this year. Each cannon is activated by a 12v solenoid. I want to wire each cannon to its own 12v momentary button switch. I have 8 button switches with through wire posts. Each cannon can be activated with an individual switch. My goal is to have a 9th button that opens all 8 solenoids at once. I'm pretty sure there is a way to do this but could use a little advice. While I'm good at plumbing gas lines, I'm not as good at electrical wiring. Thanks in advance! )'(

 

Assumptions: all valves are connected to negative ground, and all switches are connected to battery positive. For each channel, use two diodes with their cathodes connected together and to the positive wire feeding the valve; connect the anode end of the first diode to the output of the "ALL" switch and the anode of the second diode to the output of the channel switch. The diodes can be any silicon or schottky power diode.

This creates a logical "OR" effect where each valve can be fired by the master switch or the individual channel switch but no cross firing can occur.

 

Assumptions: all valves are connected to negative ground, and all switches are connected to battery positive. For each channel, use two diodes with their cathodes connected together and to the positive wire feeding the valve; connect the anode end of the first diode to the output of the "ALL" switch and the anode of the second diode to the output of the channel switch. The diodes can be any silicon or schottky power diode.

This creates a logical "OR" effect where each valve can be fired by the master switch or the individual channel switch but no cross firing can occur.

Thank You!!!